Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41995995f4a6607e5e2c3621fc480f907cc80201e871c9e38e93b2d471715b67' 
  AND token = 'MGjs37u+/31OH3XUIkm1vLgcJp9v5rjcxqq89cDDgx0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}